Laserfiche WebLink
1 <br /> Quarterly Report - June 1997 <br />' TOP FILLING STATION <br /> 101 South Wilson Way <br /> Stockton, California <br /> 1 <br /> 1 0 INTRODUCTION <br />' In accordance with a request from Mr Ed Endich of Top Filling Station, Advanced <br /> GeoEnvironmental, Inc (AGE) has prepared this Quarterly Report for 101 South Wilson Way, <br />' Stockton, California The location of the site and the immediately surrounding area are illustrated on <br /> Figure 1 -Location Map Site structures and monitoring well locations are shown on Figui e 2 - SIle <br /> Plan <br />' This report details the monitoring and sampling procedures performed on 10 June 1997 and presents <br /> the results of the laboratory analysis The objective of the sampling is to monitor concentrations of <br />' petroleum hydrocarbons in ground water at the site A description of previous investigations at the <br /> site was included in the Ouar ter ly Repoi 1 - October 1996, dated 22 No",ember 1996, prepared by <br /> AGE <br />' The moiutonn and sampling was performed i <br /> g p p o med in accordance with San Joaquin County Public Heath <br /> Sei,,ices - Environmental Health Division (PHS-EHD) and Regional Water Quality Control Board <br /> (RWQCB) guidelines for the investigation of underground storage tank (UST) sites <br /> I2 0 QUARTERLY MONITORING PROCEDURES <br /> 2 1 MONITORING WELL PURGE PROCEDURES <br /> On 10 June 1997, the depth to ground water in monitoring wells MW-1 through NIW-5, VW-IC, <br /> I VW-2A and VW-3A were measured from the top of the well casings to the nearest 0 01 foot utilizing <br /> a Solinst water level meter Relative ground water elevations from MW-1 through MW-5 were then <br /> calculated by subtr,icting the measured depth to ground water from relative casing elevations (Table <br /> I 1-Relative Ground Wales Elei ations) Relative ground water elevations were plotted and contoured <br /> on a scaled site map (Figure 3 - Relative Elevation G)ound Wales Map) <br /> After water levels were measured, approximately 9 to 15 gallons of ground water (minimum of three <br /> well volumes) were removed froin wells MW-1 through MW-5, VW-IC, VW-2A and VW-3A <br /> utilizing a Grundfos Redi-Flo H submersible pump Temperature, pH and conductivity were measured <br /> at regular intervals from each well using an ICM Model 52200 water analyzer, to monitor for <br /> stabilization of these characteristics during purging Stabilization data and field logs are included with <br /> Appendix A Purged ground water was containerized in 55-gallon drums and stored on-site in an area <br /> lacking general public access <br /> Advanced GeoEm imunentai,Ine <br />